Site index
Every page on Line of Sight in one alphabetical list, each with the line that says what it does. The home page sets the same pages out by section, which is the arrangement to read when you do not yet know what you are looking for. This one is for when you already have a name and want the page it belongs to.
How the sheets are arranged
The site is seven sections, and which one a page belongs to is usually obvious from the question you arrived with. Choosing is the largest and it is where the buying decision lives: twelve classes of machine, each written to the same eight questions so that reading two of them tells you how to skim the third, plus the specifications that decide between them and what the whole thing costs.
The UK rules is the section people arrive at second and should read first. It covers the two identifiers, registration, where flying is and is not possible, flying over somebody else's land, the lightest weight class, cover, and flying after dark. Every page in it describes what the requirement is about and names the Civil Aviation Authority as the body that publishes it.
Learning to fly is the first flights, the sticks and the simulators. Photography is what to do once the aircraft is up. Batteries is the lithium polymer pack, which is the part that wears out first and the only part that can start a fire. Parts is the anatomy, the failures and the repairs. And radio controlled aircraft is the neighbouring hobby a multirotor came out of, kept here because a model aeroplane is a real alternative and not everybody arriving at a drone site should buy one.
What the colours mean
The marks on this site are borrowed from an aeronautical chart, where colour is not decoration but vocabulary, and the same three meanings hold on every page. Magenta means a restriction: a ceiling, a boundary, or anything in the rules section. Blue means the aircraft and the airspace it flies in, so it carries the links and the choosing. Ochre means caution, and it is used only where something can be damaged or can hurt somebody, which in practice means the battery pages and the repairs. Those three are set out in the key at the edge of the screen, which is fixed there and does not scroll away, because a key you have to go back and find is a key nobody learns.